Why Does This Hose Keep Blowing Off? *pic*

[hazerb30]

Found this little hose had come off. Fixed the high idle problem ive been having See attached pic

But today it came off again. Its obviously a vacuum hose going to the fuel pressure reg but i didnt realise just how important it is until i did some reading on here.

This from sydneykid was most enlightening.. and scary

Sydneykid on FPR hose/boost guage install

There is no clamps on this little hose and no evidence there ever were so it makes me think nissan never expected it to come off. Its coming off when the car is on boost.

Anyone know why? i dont want to just clamp the thing on id rather understand whats happening because it could be pointing to something more serious?

Car is R32 gtr, 1989, 1.0 bar boost, stock computer, aftermarket turbos recently installed which were rebuilt and highflowed r33's.

Edited July 9, 2009 by hazerb30

[geraus]

hmmmmmmm maybe use a smaller hose because mine never pops off!! hmmmmmm change it brother

[jeffworld2]

just put a clamp on it, at both ends if you like.

Its not pointing to anything more serious than you running 1 bar in a 20 year old car. Clamp it and you will be fine.

[MBS206]

It's an old hose, that is starting to dry up, and lose it's ability to seal.

Time to replace.

[geraus]

cable tie it?

[hazerb30]

ok thanks guys, will replace it and clamp it as well.

I might get a dyno run and get my afr's checked as well. Dont like to mess around

[MR FLWLSS]

we always cable tie them on the dyno. cable tie's are the easyest and quickest way of doing it.

[SLAPS]

+1 for the cable tie.

I've replaced mine and it would still pop off if not cable tied.

[Duncan]

most likely there is a small split in one end of the hose, so replace it. Mine is on and off regularly (with every motor) so I cable tie it each time. Never had a problem since (and despite Gary's disagreement I run my boost controller from there)

[James_03]

I replaced myn a while ago with some good turbosmart vac line then cable tied it. Just make sure the replacement hose is the same ID.

I would recommend silicone hose for replacement over rubber too. I also never T anything off the reg line as gary mentions.

[Dose Pipe Sutututu]

geez you tight arses!

just go buy a metre of new hose from your local spares shop, it's like $4.00 a metre!

it's a 20 year old hose, the rubber probably is rock hard now.

[Brezza]

i had the same problem,

replaced the hose as its cheap as, mine had dried up and was a stretched from being on the car for 20 years.

FYI mine is a '89 R32 GTR too.

replaced the hose, cable tied it and it hasnt popped off since.

easy fix!

[l0WRB]

like everyone has said, replace it with some new hose... cheap as. and put a zip tie around it.. dont clamp it.. u mite f**k the end of the fuel reg if done 2 tight and chew ur new hose out anyway.

[Travis Trayhern]

from factory they put a small dob of glue on the end, so just replace hose and do the same no need for cable tie or clamp.